Water-circulator



(No Model.) 2 Sheets-Sheet 1.

P. & H. BLOOMSBURG.

WATER CIRGULATOR. No. 472,915. PatentedApr. 12, 1892.

lgifaesses Ital/8213 011? Teas co., Puoro-umm, WASNjNGTON, n. c.

(No Model.) 2Sheets-Sheet 2. v P. 8v H. BLOOMSBURG.

' WATER GIRGULATOR.

No. 472,915. PatentedApr. 12, 1892.7

' return-tubes in side elevation.

UNITED STATES "ATENT FFI GE.

PETER BLOOMSBURG AND HARRY RLooMsBURc, or WILMINGTON,

. DELAWARE.

WATER-Cl RCU LATO R.

SPECIFICATION forming part of Letters Patent N 0. $172,915 dated April 12, 1892.

Application filed October 8, 1891.

Serial No. 468,202. (No model.)

.To all whom it may concern:

Be it known that we, PETER BLOOMSBURG and HARRY BLOOMSBURG, both citizens of the United States, residing in the city of Wilmington, State of Delaware, have invented a new and useful Improvement in Tater-Circulators, of which invention the following is a specification.

This invention relates to apparatus for producing a circulation of the water in marine and other steam boilers.

The objects in view in our invention are,

first, to save space, which is material, especially in the case of marine boilers. This object'we effect by arranging the apparatus wholly within the boiler.

Second. Another'object is to reduce the cost of apparatus. This we eifect by red ucing the number and simplifying the form of the parts thereof.

Third. Another object is to produce a quicker and more thorough circulation of the water. This we efiect by the use of an injector-nozzle of novel construction, as well as by locat ing the apparatus wholly within the boiler, where it works in an equilibrium of pressure.

In the annexed drawings, Figure 1 is a longitudinal section on the line '0 c in Fig. 3 of the shell and smoke-box or combustion-chamber of a marine boiler, showing our circulator and one of the usual furnace-fines with its Fig. 2 is a longitudinal section of the same on the line 112 w in Fig.3, showing our circulator and the return-tubesin plan. Fig. 3 is a front end elevation of the same, the head of the boiler being removed. Fig. 4 is a side elevation, and Fig. 5 a front end elevation, of the injector-nozzle 6. Fig. 6 is a rear end elevation of said nozzle with cap removed, and Fig. 7 is a longitudinal section of the same on line x 00 in Fig. 5. Fig. 8 is a plan of the injector (marked f,) arranged at the bottom of the boiler; and Fig. 9 is a section of the same on line y yin Fig. 8. Fig. 10 is a plan, and Fig. 11 a sec tion, both on an enlarged scale, but similar in all other respects to Figs. 8 and 9, respectively. Fig. 12 is aside elevation, and Fig. 13 an end elevation, of the same. Fig. 14 is a sectional plan of the -injector f on the line 2 z in Fig. 11.

Similar letters denote similar parts in the several figures.

or represents the shell of the boiler; b, the furnace-fines; c, the smoke-box or gas-combustion chamber; and d, return-tubes leading from the chamber a to the chimney or stack. (Not shown.)

6 represents an injector-nozzle, consisting of an annular passage e for feed-water, the cylindrical passage c and the annular exterior passage 6 The injector-nozzle e'is located below and near the surface of the water.

' f represents an injector J arranged at or near the bottom of the boiler and provided with an annular steam-passage f the interior water passage f and the annular water-passage f exterior to the steam-passage f.

g g g 9 represent the pipes of the circulator, all arranged within the boiler below the usual water-line. The pipe g extends from its connection with the nozzle 6 through the boiler-shell, outside of which it is joined to the ordinary feed-Water pip'e h, which is supplied in this case, as usual, by a pump. (Not shown.)

1' represents the ordinary check-valve in pipe h. 4

The pipe g branches from pipe g and extends through the boiler-shell, outside of which it is joined to the ordinary injector feed-water pipe, the latter being provided with the usual check-valve j. The pipe g connects the nozzlee with the (marked f.) The pipes g extend from their connection with the J (marked f) a greater or less distance along the bottom of the boiler and have open ends for the admission of water.

it; is a pipe extending from a donkey-boiler through the shell or of the main boiler and connected with the annular steam-opening in the (marked f.)

Z is a stop-valve in pipe k.

A slow fire having been started in the furnaces, steam from the donkey-boiler-is at the same time admitted by pipe 70 through the stop-valve Z into the injector (marked f,)

from which it passes through the annular steam-passage f, inducing a current of water from the bottom of the boiler into the ends of the pipes and through the interior water-passagef and the exterior annular waterpassage f 3 into the vertical pipe 9 from which the induced waterpasses through theinjec-tornozzle 6, and is discharged near the surface of the body of water, the induced water being heated on its way by the steam that mixes with it and imparting its heat to the body of Water at the surface thereof by discharging into the latter and at the same time rapidly circulating the water in the-boiler, this action being kept up until all the water in the main boiler a has become heated and steamhas begun to form inthis boiler, when steam from the donkey-boiler is shut off by closing valve Z. The injector, referring now to the ordinary feed-water injector, (not shown,) is then started with steam from the donkey-boiler, and the main boiler ais filled to its proper level. The feed-water from the last-named injector, as well as that from the feed-water pump, referring to the ordinary feed-water pump, (not shown,) isdischarged through the annular passage e' of the injector-nozzle e and induces a current of water from the bottom of boilera intov the suction-pipes 9 up the pipe g out through the interior water-passage e and annular exterior passage e thus raising the colder water from the bottom and discharging it at the surface, while the hotter water settles down to take the place of the water raised. By this means a rapid, constant, and thorough circulation of the water is maintained.

The suction-pipesg maybe perforated along their lengths and they may have closed instead of open ends, if desired.

One of the suction-pipes g may be omitted; but such omission would in some cases injure the efficiency of the apparatus.

Instead of constructing the injector-nozzle e and the injector' (markedf) in the manner described, they may be made in the usual form of injector-nozzles; but when they are made each with an annular discharge-passage which surrounds an interior suction-passage, and is surrounded by an exterior suction-passage, as first described, a frictional surface,

which is enormous as compared with the volume of the discharge, is obtained for transmitting the momentum of the feed-water and steam, respectively, to the water to be acted upon.

The inj ectornozzle or device employing the above-described annular column as the inducing factor can be used for moving gases or powdered solids as Well as liquids.

We claim i 1. The combination, with a main steamboiler, of these appliances when contained within the boilernamely, a discharge-injector nozzle arranged at or below the waterline, one or more pipes connecting said nozzle with the feed-Water pipe or pipes, and a suction-pipe connecting said nozzle with an inj ector J or device arranged at or near the bottom of the boiler and provided with one or more water-suction pipes and also with. an

orifice for the admission thereto of steam by pipe connection from a donkey-boiler, forming a device for starting and maintaining a constant and rapid circulation of the Water in the main boiler, substantially as set forth.

2. The combination ofnozzle 6, provided with an annular feed-Water discharge-passage and internal and external suction-passages, pipes g and g for respectively connecting said nozzle with the usual feed-water pipes located outside the mainboiler a, suction-pipe 

